Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Sharks have been on the planet longer than trees.
14
There's a rare breed of pig that looks like a sheep.
14
Sloths take two weeks to digest their food.
243
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4